Hello Monks, I can't figure out what to do with my s/// line below to get rid of the 'uninitialized value in substitution' error that I'm getting. I looked at this earlier thread for some insight, but can't figure out how to apply it to my case. Anyway, the offending code is: 
# initialize @row
my @row;
# for each table row, apply all the regex patterns in order to the tva
+l_test column
    open(FILE, "< $file") || die "Can't open regex.txt: $!\n";
        while(my $regex=<FILE>){
            # get all tval_test columns
            my $sql_q = "select tval_test from cas_testbed.rtemp";
            my $sthr = $dbh->prepare($sql_q);
            $sthr->execute;            
            my @rex = split(/\s/,$regex);  
            # work on each tval_test row
            while (@row = $sthr->fetchrow_array){
                # search for $rex[0] and replace with $rex[1]
                s/$rex[0]/$rex[1]/ig;
            } # END while (@row = $sth->fetchrow_array)
            $sthr->finish;
        } # END while(my $regex=<FILE>)
    close FILE;

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In reply to DBI, s/// => unitinitialized value in substitution by brwarn

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